Distributed Power Arrangement for Localized Plasma Processing
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Solution Overview
Problem
Current power distribution methods in semiconductor processing lack granular control over power delivery to specific regions of the processing chamber, leading to non-uniform substrate processing and require complex, expensive matching networks as the system scales.
Innovation Solution
A distributed power arrangement with multiple local RF generators, each coupled to electrical elements within the processing chamber, allows for independent control of power delivery to different regions, reducing the need for complex matching networks and minimizing power loss by distributing DC power supply units close to the processing area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single power source is used to supply power to the processing chamber, then the system structure is simple, but the control over power distribution uniformity is insufficient
Solution Approach 1:
The patent divides the single power source into multiple distributed RF power generators (304, 306, 308, 310) that are spatially separated and positioned at different locations within the processing chamber. Each generator independently supplies power to specific regions, enabling localized control of power distribution to achieve uniform substrate processing while maintaining reasonable system complexity through modular architecture
Solution Approach 2:
The patent implements local power generation by positioning RF power generators (304, 306, 308, 310) at specific locations within the processing chamber, allowing each generator to deliver power with optimized characteristics to its local region. This localizes the power delivery function to where it is needed, improving substrate processing uniformity through region-specific power control
2Manufacturing precision
If multiple power sources are distributed locally, then the power delivery control is precise, but the system complexity and cost increase
Solution Approach 1:
The patent segments the power system into multiple independent RF power generators (304, 306, 308, 310), each handling a portion of the total power delivery task. This segmentation allows precise local control while keeping each individual generator simpler and more manageable, reducing the complexity burden of having multiple power sources
Solution Approach 2:
The distributed RF power generators (304, 306, 308, 310) are designed with universal functionality to perform multiple roles: generating RF power, providing local matching, and enabling independent regional control. This multi-functionality reduces the need for separate dedicated components for each function, thereby controlling system complexity while achieving precise power delivery
3Ease of operation
If power is transmitted over long distances through transmission lines, then the power source can be located remotely, but power loss and matching complexity increase
Solution Approach 1:
The patent extracts the RF power generation function from a remote centralized location and places it directly at the processing chamber locations (304, 306, 308, 310). By taking out the power generation function from the traditional remote RF generator and distributing it locally, the system eliminates long transmission lines and associated power losses while maintaining placement flexibility
Solution Approach 2:
The patent introduces local RF power generators (304, 306, 308, 310) as intermediary devices between the power source and the processing regions. These intermediaries convert DC power to RF power locally, eliminating the need for long-distance RF power transmission and reducing power loss while providing flexible placement within the chamber
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables more uniform substrate processing by allowing precise control of power distribution, reducing system complexity and cost, and improving reliability through modular, locally controlled RF generators.
Implementation Method 1
A distributed power arrangement for performing local power delivery and local control during substrate processing in a plasma environment may include a set of direct current (DC) power supply units and a plurality of power generators
Implementation Method 2
A distributed power arrangement for performing local power delivery and local control during substrate processing in a plasma environment
Data Source
AI summary
A distributed power arrangement to provide local power delivery in a plasma processing system during substrate processing is provided. The distributed power arrangement includes a set of direct current (DC) power supply units. The distributed power arrangement also includes a plurality of power generators, which is configured to receive power from the set of DC power supply units. Each power generator of the plurality of power generators is coupled to a set of electrical elements, thereby enabling the each power generator of the plurality of power generators to control the local power delivery.